I just had to teach him to make sure it was tucked in everytime and we got one that was 3 pieces so now we just use the seat which doubles as a seat for the big toilet and the base which doubles as a stool upside does and we put away the part that he used to go in and now he just climbs up there and goes and if it ends up being number 2 we can flush it and I don't have to deal with. Rinsing it out or dumping it. . He actually goes pee now standing and aiming from the stool but when he first learned he just had to tuck it in when he sat. I know that's not really what you were asking...but that's how I did it with mine who is now 2 and a half